# **Difference between compile-time and runtime polymorphism?** [Java Course in Pune](https://www.sevenmentor.com/java-training-classes-in-pune.php) Java is among the most robust and popular programming languages. One of the main reasons for its success is its object-oriented design. The fundamental concepts in Object-Oriented Programming (OOP) in Java is method overloading as well as method overloading. These concepts are closely related to polymorphism, which permits the same technique to act differently depending on the environment. Understanding the concept of overloading and overriding is essential for any Java developer, since these functions make code adaptable, reuseable and simple to maintain. Method overloading with Java occurs when more than two methods belonging to the same class have the same name, but differ in their parameters lists. The reason for this could be numbers of parameters used, nature or order. This is referred to as compile time polymorphism since the method call is resolved in the course of the compilation. For instance, if we build a Calculator class that has different versions of add() method, for instance add() method, one could be able to handle two integers, a different version could be able to handle three integers, and yet another can handle two double numbers. Though all methods use the identical title, it is the compiler that chooses the one to call by analyzing the arguments that are passed to. Method overloading is very beneficial since it enhances code readability as well as flexibility. It also allows developers to make use of the same method name for various functions that are related. On the other hand methods overriding with Java happens when a subclass offers its own version of a method already defined by its superclass. The method that is overridden must have the same name return type, return type, and list of parameters as the method's parent. This feature is known as polymorphism at runtime, which means that the method's call is completed when the program runs. Consider, for instance, a superclass named Animal with an method called of sound(). If subclasses such as Dog as well as Cat can override this method, they can offer their own versions that uses sounds() to display "Dog barks" or "Cat meows." If you create an instance of Dog and Cat and invoke an the sound() method, Java determines at runtime what version of the method to run. Method overriding is crucial as it permits subclasses to determine their own particular behaviours while having a common interface thanks to inheritance. The primary difference between overloading and overriding is the manner in which and how the method is solved. Overloading is an example the static polymorphism, also known as compile time while overriding can be a case of runtime polymorphism or dynamic. Overloading is a part of the same class, and permits methods that have similar names deal with different parameter types and counts and overriding is always involving an overclass and subclasses, which ensure that the subclass is able to redefine methods that it inherits of its mother. Overloading is resolved during the time of compiling, whereas overriding occurs when the program is running. In real-world applications, methods overloading and overriding have proven to extremely beneficial. Overloading is typically utilized in corporate systems in which one operation can include multiple variations. For instance in the case of a payment processing system, it is possible to take payments via various payment methods, such as debit card, credit card or UPI. [Java Classes in Pune](https://www.sevenmentor.com/java-training-classes-in-pune.php) Instead of creating distinct methods for each, you can just overload processPayment() processing() method with various list of parameters for each type of payment. Overriding is, however is commonly employed in systems that are based on inheritance. For instance for an e-commerce system there could be an initial class Discount and subclasses that include SeasonalDiscount, FestivalDiscount as well as loyaltyDiscount. Each subclass could modify this applicationDiscount() method to create its own logic in line with its structure base class. Overriding and overloading have a major role to play in creating Java code more reliable and easily maintained. Method overloading enhances accessibility by allowing developers make use of a single method name for a variety of tasks, which reduces confusion and facilitating API design. Method overloading, on the contrary, brings the real power of polymorphism into life by letting subclasses define methods they inherit without altering their parent classes, which improves flexibility and flexibility. In the end methods overloading and method overriding comprise two important concepts of Java programming. Overloading is flexible because it allows multiple methods that share the same name, but with different parameter lists that are which are resolved at compile time while overriding lets subclasses redefine inherited methods and is resolved during time of execution. Together they help strengthen the base of object-oriented software in Java which makes applications more adaptable, flexible and more closely matched to solving real-world problems. Anyone who is aspiring to be a Java developer should be able to learn these two concepts as they are often asked about during interviews, extensively employed on projects. They constitute the foundation for writing clear and flexible code. Utilizing methods that overload and override effectively developers can develop software that is not just efficient, but also able to evolve with the changing requirements of business. [Java Course in Pune](https://www.sevenmentor.com/java-training-classes-in-pune.php)